Is this normal or abusive behavior?

I am writing this as I am concerned for my best friend. She is 24 and has been dating someone for a year. Recently I introduced her to one of my friends and they became good friends instantly. Well, he's married and not looking for any relationship of sorts. But while she was telling about him to her boyfriend he had tears in his eyes! When they were saying goodbye he said to her she will be only his and no man will ever have her! I heard this from the next room.

The boyfriend is 27 and has always seemed a bit odd to me for wanting to go out with her when she was hanging out with her guy friends. I thought he was just being a little jealous. Now I think he's showing signs of possessiveness. I don't want it to lead to an abusive relationship. I know it's between them and I'm acting like a overprotective friend and this is probably not a big deal but it's always been this way and I don't want her to end up being miserable with him. I would like to talk to her without making her feel she can't take care of herself. I just want to make sure she's safe with him. What do you think?

From the looks of it she dont look safe with the boyfriend. But you she should come to you asking for advice. Unless until she does that you realy have no right to speak in their relationship.

You could be meddling in too much.

I fail to understand, HOW IS IT MEDDLING?

Behavior of the boyfriend is clear from the story. What do you think when should she "meddle" when he abuses her fully, or injure her or does soemthing drastic? This is the mentality in this country that I do not understand. If loved one is worried about their dear ones' safety, they are meddling. And what good would it be, if one fine day they receive some earth shattering news.

To the OP, please talk to your girlfriend, win her trust and ask her if she needs any kind of help, or better yet, she needs a shoulder.